Trent realizes that Sarah’s skepticism, the doubt in her voice echoes Lottie and the last conversation he had with her. How might this change things?

In Part II, Trent senses doubt in Sarah's tone as she talks about Jason Dorrant being the perpetrator. Trent's ability to pick up on this tone is what makes him so successful during interrogations. When Trent questions her on this, she admits that she is not convinced because there is no physical evidence that points to Jason. Trent realizes that Sarah reminds him of his wife, Lottie, which foreshadows a relationship forming between the two as the work on the Bartlett case together.